ECU HUMMER H3 2008 Owner's Guide

If you set off the alarm by accident, you can turn it off
by pressing unlock on the remote keyless entry
transmitter, starting the vehicle with the correct key, or
by having OnStar
®unlock the doors. The alarm will
not stop if you try to unlock a door any other way.
Testing the Alarm
To test the alarm:
1. From inside the vehicle, activate the system by
locking the doors with the remote keyless entry
transmitter.
2. Unlock the door with the manual door lock and
open the door. This should set off the pre-alarm.
Wait 10 seconds for the full alarm to activate.
3. To turn the alarm off, press the unlock button
on the remote keyless entry transmitter or start
the engine.
If the alarm does not sound when it should but the
lights ash, check to see if the horn works. The horn
fuse may be blown. To replace the fuse, seeFuses
and Circuit Breakers on page 5-102.
If the alarm does not sound or the front turn signal
lamps do not ash, see your dealer/retailer for service.
Passlock®(U. S. Only)
Your vehicle has the Passlock®theft-deterrent system.
Passlock®is a passive theft-deterrent system.
Passlock®enables fuel if the ignition lock cylinder is
turned with a valid key. If an incorrect key is used or the
ignition lock cylinder is tampered with, the fuel system
is disabled and the vehicle will not start.
During normal operation, the security light will turn off
approximately ve seconds after the engine is started.
SeeSecurity Light on page 3-39.
If the engine stalls and the security light ashes, wait
about 10 minutes until the light stops ashing before
trying to restart the engine. Remember to release
the key from START as soon as the engine starts.
If the engine does not start after three tries, the vehicle
needs service.
If the engine is running and the security light comes on,
you will be able to restart the engine if you turn the engine
off. However, your Passlock
®system is not working
properly and must be serviced by your dealer/retailer.
Your vehicle is not protected by Passlock
®at this time.
See your dealer/retailer for service.
In an emergency, call the Roadside Assistance Center.
SeeRoadside Assistance Program on page 7-6.
Do not leave the key or device that disarms or
deactivates the theft deterrent system in the vehicle.
2-15

PASS-Key®III+
The PASS-Key®III+ system operates on a radio
frequency subject to Federal Communications
Commission (FCC) Rules and with Industry Canada.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation.
This device complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
1. This device may not cause interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
Changes or modications to this system by other than
an authorized service facility could void authorization to
use this equipment.
PASS-Key
®III+ uses a radio frequency transponder in
the key that matches a decoder in your vehicle.
PASS-Key®III+ Operation
(Canada Only)
Your vehicle has a passive theft-deterrent system.
The system is automatically armed when the key
is removed from the ignition.
The system is automatically disarmed when the key is
turned to ON/RUN.
You do not have to manually arm or disarm the system.
The security light will come on if there is a problem
with arming or disarming the theft-deterrent system.
The key uses a transponder that matches an immobilizer
control unit in your vehicle. Only the correct key will
start the vehicle. If the key is ever damaged, you may
not be able to start your vehicle.
When trying to start the vehicle, if the engine does not
start and the security light comes on, there may be
a problem with your theft-deterrent system. Turn
the ignition off and try again.
If the engine still does not start, and the key appears
to be undamaged, try another ignition key. At this
time, you may also want to check the fuse.
SeeFuses and Circuit Breakers on page 5-102.
2-16

If the engine still does not start with the other key, your
vehicle needs service. If your vehicle does start, the
rst key may be faulty. See your dealer/retailer who can
service the theft-deterrent system and have a new
key made.
It is possible for the theft-deterrent system decoder to
learn the transponder value of a new or replacement
key. Up to 10 keys can be programmed for the vehicle.
The following procedure is for programming additional
keys only.
Canadian Owners:If you lose or damage your keys,
only a dealer/retailer can service the theft-deterrent
system to have new keys made. To program additional
keys you will require two current driver’s keys.
To program a new key do the following:
1. Verify that the new key has PK3+ stamped on it.
2. Insert the current driver’s key in the ignition
and start the engine. If the engine will not start
see your dealer/retailer for service.
3. After the engine has started, turn the key to
LOCK/OFF, and remove the key.4. Insert the second current driver’s key in the ignition
and start the engine within ten seconds of removing
the previous key. If the engine will not start see
your dealer/retailer for service.
5. After the engine has started, turn the key to
LOCK/OFF, and remove the key. Insert the key to
be programmed and turn it to ON/RUN within
ten seconds of removing the previous key.
The security light will turn off once the key has
been programmed.
6. Repeat the Steps 1 through 5 if additional keys are
to be programmed.
If the security light comes on and stays on while driving,
you will be able to restart the engine if you turn it off.
The theft-deterrent system, however, is not working
properly and must be serviced by your dealer/retailer.
Your vehicle is not protected by the theft-deterrent
system at this time.
In an emergency, contact Roadside Assistance.
SeeRoadside Assistance Program on page 7-6.
Do not leave the key or device that disarms or
deactivates the theft deterrent system in the vehicle.
2-17

OnStar®System
OnStar uses several innovative technologies and live
advisors to provide you with a wide range of safety,
security, information, and convenience services.
If your airbags deploy, the system is designed to
make an automatic call to OnStar Emergency advisors
who can request emergency services be sent to
your location. If you lock your keys in the vehicle,
call OnStar at 1-888-4-ONSTAR and they can send
a signal to unlock your doors. If you need roadside
assistance, press the OnStar button and they can
contact Roadside Service for you.
OnStar service is provided to you subject to the
OnStar Terms and Conditions. You may cancel your
OnStar service at any time by contacting OnStar
as provided below. A complete OnStar Owner’s Guide
and the OnStar Terms and Conditions are included
in the vehicle’s OnStar Subscriber glove box literature.For more information, visit onstar.com or onstar.ca,
contact OnStar at 1-888-4-ONSTAR (1-888-466-7827)
or TTY 1-877-248-2080, or press the OnStar button
to speak with an OnStar advisor 24 hours a day,
7 days a week.
Not all OnStar features are available on all vehicles.
To check if your vehicle is equipped to provide the
services described below, or for a full description of
OnStar services and system limitations, see the OnStar
Owner’s Guide in your glove box or visit onstar.com.OnStar Services
For new vehicles equipped with OnStar, the Safe &
Sound Plan, or the Directions & Connections Plan
is included for one year from the date of purchase.
You can extend this plan beyond the rst year, or
upgrade to the Directions & Connections Plan.
For more information, press the OnStar button to
speak with an advisor. Some OnStar services (such
as Remote Door Unlock or Stolen Vehicle Location
Assistance) may not be available until you register
with OnStar.
2-48

Your Responsibility
You may need to increase the volume of your radio
to hear the OnStar advisor. If the light next to the OnStar
buttons is red, this means that your system is not
functioning properly and should be checked by a dealer.
If the light appears clear (no light is appearing), your
OnStar subscription has expired. You can always press
the blue OnStar button to conrm that your OnStar
equipment is active.
Universal Home Remote
System
The Universal Home Remote System provides a way to
replace up to three hand-held radio-frequency (RF)
transmitters used to activate devices such as garage
door openers, security systems, and home lighting.This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation.
The FCC Grant of Equipment Authorization Certicate
number is CB2SAHL3.
This device complies with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
1. This device may not cause interference.
2. This device must accept any interference received,
including interference that may cause undesired
operation of the device.
The Canadian Registration ID number is 2791021849A.
Changes or modications to this system by other
than an authorized service facility could void
authorization to use this equipment.
2-51

Universal Home Remote System
Operation (With One Triangular LED)
If there is one triangular Light Emitting Diode (LED)
indicator light above the Universal Home Remote
buttons, follow the instructions below.
This system provides a way to replace up to three
remote control transmitters used to activate devices
such as garage door openers, security systems,
and home automation devices.
Do not use the Universal Home Remote with any
garage door opener that does not have the stop and
reverse feature. This includes any garage door opener
model manufactured before April 1, 1982.Read the instructions completely before attempting to
program the Universal Home Remote. Because of
the steps involved, it may be helpful to have another
person available to assist you in the programming
the Universal Home Remote.
Keep the original hand-held transmitter for use in other
vehicles as well as for future Universal Home Remote
programming. It is also recommended that upon the
sale of the vehicle, the programmed Universal Home
Remote buttons should be erased for security purposes.
See “Erasing Universal Home Remote Buttons” later
in this section.
When programming a garage door, park outside of
the garage. Park directly in line with and facing
the garage door opener motor-head or gate motor-head.
Be sure that people and objects are clear of the
garage door or gate you are programming.
It is recommended that a new battery be installed in
your hand-held transmitter for quicker and more
accurate transmission of the radio-frequency signal.
2-52

Front Seat Storage Net
Your vehicle has storage nets located on the back of
the front seats. To remove these nets, pull out on each
of the four clips located on the net.
Front Armrest Storage Area
Your vehicle has a front armrest storage area. To open,
lift the latch on the front of the armrest and pull up.
Luggage Carrier
If your vehicle has this feature, you can load cargo on
your vehicle.
The luggage carrier consists of siderails attached to
the roof. The crossrails attach into the siderails and
can be moved back and forth to accommodate various
cargo sizes.
Notice:Loading cargo on the luggage carrier
that weighs more than 250 lbs. (113 kg) or hangs
over the rear or sides of the vehicle may damage
your vehicle. Load cargo only on top of the
crossrails and tie the cargo down to the crossrail
support cargo tie-down loops, making sure to
fasten it securelyDo not exceed the maximum vehicle capacity when
loading your vehicle. For more information on vehicle
capacity and loading, seeLoading Your Vehicle
on page 4-42.
Adjusting the Crossrails
To adjust the crossrails to t your load:
1. Use the provided crossrail key to unlock the
crossrail end cap by turning it counterclockwise.
2-57

Stop Tabs
If your vehicle has a sunroof, it will have a crossrail stop
tab placed in the siderail. This tab prevents you from
moving the crossrails past the opening of the sunroof
and loading cargo too far forward.
Your vehicle may have cargo tie downs. Once you
load the cargo onto the crossrails, secure it by tying it
down to the cargo tie downs. Do not load cargo directly
on the roof of your vehicle. SeeCargo Tie Downs on
page 2-59for more information.
Rear Storage Area
Your vehicle has a rear storage area located on
the passenger’s side of the cargo area. To open,
pull the two tabs out and open lid.
Convenience Net
Your vehicle may have a convenience net in the rear
of the vehicle. Put small loads behind the net. The net
is not for heavier loads. Store them as far forward
as you can.
Cargo Cover
Notice:If you put items onto the cargo cover, the
weight of the items could cause the attachment clips
to break. You would no longer be able to attach
and use the cargo cover. The repairs would not be
covered by your warranty. Never put anything
on top of the cargo cover.
If your vehicle has a cargo cover, you can use it to
cover items in the rear of the vehicle. Remove the
cover from its pouch and place the loops found on
each corner of the cover, over the two pegs in each
corner of the rear if the vehicle. When it is not in
use, fold up the cover and return it to the pouch.
Cargo Tie Downs
Your vehicle may have four cargo tie-downs. These
tie-downs are located in tracks on the roof of the vehicle.
Each tie-down can be moved to anywhere on the
track. To loosen, turn the tie-down counterclockwise
until it moves freely in the track. To tighten, turn
the tie-down clockwise.
2-59

Malfunction Indicator Lamp.............................3-36
Oil Pressure Light.........................................3-38
Security Light...............................................3-39
Cruise Control Light......................................3-39
Highbeam On Light.......................................3-39
Fuel Gage...................................................3-40
Driver Information Center (DIC).......................3-40
DIC Operation and Displays...........................3-40
DIC Warnings and Messages.........................3-43Audio System(s).............................................3-48
Setting the Time...........................................3-48
Radio(s)......................................................3-49
XM Radio Messages.....................................3-60
Navigation/Radio System...............................3-61
Theft-Deterrent Feature..................................3-61
Radio Reception...........................................3-61
Fixed Mast Antenna......................................3-62
XM™ Satellite Radio Antenna System.............3-62
Section 3 Instrument Panel
3-2

{CAUTION:
Even though the passenger sensing system is
designed to turn off the right front passenger’s
frontal airbag if the system detects a
rear-facing child restraint, no system is
fail-safe, and no one can guarantee that an
airbag will not deploy under some unusual
circumstance, even though it is turned off.
We recommend that rear-facing child restraints
be secured in the rear seat, even if the airbag
is off.
If the word OFF or the off symbol is lit on the airbag
status indicator, it means that the passenger sensing
system has turned off the right front passenger’s frontal
airbag. SeePassenger Sensing System on page 1-62
for more on this, including important safety information.If, after several seconds, both status indicator lights
remain on, or if there are no lights at all, there may be a
problem with the lights or the passenger sensing
system. See your dealer/retailer for service.
{CAUTION:
If the airbag readiness light in the instrument
panel cluster ever comes on and stays on, it
means that something may be wrong with the
airbag system. If this ever happens, have the
vehicle serviced promptly, because an
adult-size person sitting in the right front
passenger’s seat may not have the protection
of the airbag(s). SeeAirbag Readiness Light
on page 3-29for more on this, including
important safety information.
3-31